MR816  as well , FYI Leonard, I am on windows 10 with no problems with the driver.

I'm using a Focusrite Scarlett 18i20 with a cheap Behringer ADA8200 to give me another 8 channels with ADAT.  I picked up the 18i20 on sale for $400 and the ADA8200 was only $200.  The Focusrite works great and is really flexible.  The Behringer actually works pretty well considering how cheap it is.  $600 for 16 channels with both units is hard to beat.

I sold my two FF800s to get an RME UFX.not question about the quality of sound and super low latency.

I had a Presonus Studiolive 2442 but sold it and recently purchased a Presonus RM16AI. For the price I can't believe what's been packed into this unit and it sounds great too. I'm interested in exploring the cohesion between the Presonus hardware and software.

All on Win 10.

Lynx Two model C. No problems at all.

2 Roland Studio Capture 1610's synched together for 32 ins and 20 outs! Love 'em!

In my view, if you'd like to buy only one interface in your lifetime (maybe a stretch but that's almost true) aim for an RME.
 
They use a field programmable chip that allow them to reconfigure the whole firmware of any interface they ever produced (with the exception of the very early ones that don't feature hammerfall).
 
So do yourself a favor and aim for RME. Any of them.  If you can save for their latest models all the better (recent converter/clock technology).
 
Can be expensive at first but if your serious about recording and prioritize stability you'll never look back and will keep it for at least 10 years. You'll even forget it's there ;)

I use two - a TC Konnek 48.  With the new FW drivers latency is below 5 ms.  I also use a TASCAM UH-7000 both connected to the 48 via Spdif/AES or just use it over USB if latency isn't an issue (10ms) or don't need the extra inputs.
 
@
PS - I had Presonus (Firestation in the dark ages and a FirePod later) and have nothing but good things to say about the hardware and company.  The TC was a step up in sound quality (esp. the preamps in those older units) and the TASCAM another step up.  But bang for buck, it is hard to beat the Pod or whatever they are calling it now.  If you don't need the extra inputs, most of the stereo hardware will allow you to do good work.

I recently moved from a Mackie 1200f to a UAD Silverface Apollo Quad. I couldn't believe the difference in mixing (the DA) - haven't even used the mic pres yet...

Plain and simple
 
Focusrite Scarlett 6i6 or anything FOCUSRITE!!   100% rock Solid and million times better than older interfaces.
I used to have no end of trouble with my EMU 0404 USB box.
 
Now down to 6ms and tanking along!!!
 
ATB
John

Just one Roland Octacapture is perfect for me because it's small, it's dependable, it's straightforward, and because I never need more than the number of inputs it offers.
 
I like it very much.
 
LJ