Drum loops - REX2 vs ACID WAV for Sonar 64-bit

I'm thinking about ordering some SmartLoops for the first time (partly because they have a dedicated, multitrack collection of good-sounding 6/8 grooves, thank you).  Thing is, I'm using Sonar PE 8.5 64-bit, in Vista 64 Home, and earlier today I read that Sonar 64-bit's Media Browser is/was unable to "see" REX loops in the main browser window (as opposed to the Explorer area), reportedly because REX isn't 64-bit compatible.  Is this [still] true?
 
http://forum.cakewalk.com/tm.aspx?high=&m=1920056&mpage=1#1920097
 
IIRC, REX loops import with little markers already placed at locations relevant to the project's tempo and beat lines? (sorry if that's not the right term).  I like the sound of that, but darnit, it's crucial that I be able to audition the loops in the Media Browser while my existing arrangement/project (which had drums but needs better ones) plays along with it at project tempo - rather than having to drag/drop the loops into the project each time just to see if it works with the song.  So 64-bit Media Browser compatibility is a must for me...
 
Although...
 
I do have Stylus RMX (which I realize is also 64-bit) - But does it use any kind of "bridge" that would let me audition REX loops with it, rather than with the Media Browser?
 
BTW, I'm not against acidized wav.  If it turns out that that's the better choice for what I'm wanting to do, fine.  I guess I'm just under the impression that REX2 = newer = somehow better.  Thoughts?  Thanks.

Hey thanks for the reply.  Yeah, Media Browser is a great addition, when it works.  Actually, I mentioned Stylus RMX because I remember that REX support was one of its selling points (for some), but I've never bought a REX library myself.  But now that I'm sort of interested, and reading up on it, apparently Stylus first converts the REX loops into RMX loops, which I guess essentially converts the "non-64-bit-ness" right out of 'em(?)  If so, then I may not have to rule out the REX route after all.

If anyone here swears by REX format over ACIDized wav, for whatever reason, hey let's have it.  I just don't want to regret not choosing it, if there's a good reason to.  Especially if I'm going to go for one of the bigger, more expensive loop bundles. (...it's too bad SmartLoops doesn't just include both formats, like Nine Volt Audio does with their collections.)

Thanks, Scott.

BTW, (just brainstormin' here) does anyone know whether 64-bit Sonar's "Import Audio" dialog box, with its little "Play" button, "sees" and plays REX files like the 64-bit Media Browser apparently doesn't?  I don't have any REX loops, but the Import Audio method does play regular audio loops in time and at project tempo just like Media Browser.  And if it's more akin to the Explorer part of the Media Browser, which does see REX, maybe it can be a sneaky little workaround?  (not holding my breath though.)  Just wonderin'.

yes it is i try playing rex loops on my 64 bit. i ask someone at sweetwater and they conatct cakewalk this what they said...

(Hi Marcus, 
 
  I confirmed with Cakewalk that a 64 bit installation of Sonar cannot use REX files. It was explained to me that the problem lies within the REX file format. Propellerheads needs to update the REX file format for 64 bit compatibility. 
 
  Using a 32 bit version of Sonar will allow you to import REX files. Incidentally, Cakewalk said that you can actually have a 64 bit and a 32 bit version of Sonar installed at the same time without conflict (just exit one before starting the other). 
 
Go with acid loops are wavs..

You can download a bunch of free loops in REX and ACID format here... http://www.smartloops.com/Free/

Then you can see which format works best for you.

~Frank