Am I missing something. Someone mentioned Melodyne Editor for $149. Sonar X3 came with Essential correct? And this is off their website
 
Upgrade from Melodyne essential (all versions)
US$299
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The best way to upgrade those DT770's is to run them through a Focusrite VRM box. I have 80 ohm DT770 Pro's and the combo is pretty amazing. I think there is a Melodyne Editor upgrade discount for X3 users. I didn't get the email but a search will probably bring up the discount code.
 
Rocky

notfadeaway...
Am I missing something. Someone mentioned Melodyne Editor for $149. Sonar X3 came with Essential correct? And this is off their website
 
Upgrade from Melodyne essential (all versions)
US$299
Add to cart

When you register Melodyne Essential, Celemony on their website immediately offers a discount to Editor for $149 and then follows up with an email with the discount offer good for 10 days.

Sony MDR 7520 headphones
 
http://www.bhphotovideo.com/bnh/controller/home?O=&sku=758138&Q=&is=REG&A=details   <--- best price I've seen.

A hardware compressor is definitely useful for tracking. Honestly I don't really believe in hardware bus compressors. I almost never ended up using the SSL copy at my previous studio. The software versions are getting so good and are a LOT more convenient and cheaper.
 
For your core business, apart from a good recording compressor I would then also say get some good plugs. The Cakewalk ProChannel pack is cool, though I mostly use the LA2A from that - it is really very good. Waves is having a sale on the very comprehensive Diamond bundle which includes the great Renaissance bundle (Renaissance Compressor and Renaissance Vox are still among my favorites) and a host of other useful and sometimes really unique things compared to what you have now. It also includes some excellent and widely used mastering plugs. Buy via a dealer such as plugindiscounts.com for an even better price.
 
Melodyne is definitely worth the deal price, +1 on that.