When I was researching for the Back Inflated setup, I strongly considered the IQ Pack, since my brother had the Trans Pack, I could compare the 2 of them.
After pondering the thing for a few months, I decided for the OMS SS BP, SS STA and Deluxe Harness, due to tank stability, the soft pack may not provide the stability a BP provides.
The IQ can acomodate a BP inside and provide the BP stability, but as kidspot pointed out, the extra padding of a soft pack may make it a bit harder to clean up and the extra back padding won't make a big diference in confort.
The only diference in confort that I found was on the shoulder straps of the harness, and with the shoulder pads available, the problem was corrected.
OMS has responded to all my requests in a promptly manner via my distribuitor in Miami (Austins) and provided me all the gear I asked for (even 2 additional BP/W setups for my buddies) in a reasonable time frame (1-2 weeks tops)
If you want super fast delivery, go to
WWW.Diveriteexpress.com, those guys are the fastest guns around.
The wing is another discusion, but the main decison with OMS is if bungies or not, they carry non banded wings as well as bungied wings, the choice is yours, but be confident that quality is excellent in these wings
QR are more of a personal choice, I've never heard of a QR failure, but I suppose it can happen as many other things can happen. All jacket style have QRs and thouthands of harnesses use them so they can't be that bad. I wouldn't trust a QR in my sky dive harness due to shock loads, but for diving I consider them a great comodity.
Do your research and decide on the features you like, then shop for brand and price. Unless you buy some strange never heard off brand, you should be ok with any of the top manufacturers.