I have a 32 channel rm32ai by Presonus. 32 in, 16 out. Preamps built in. I connect it via FireWire 800, control it with the PC, and with a CS18 controller at engineering position. I can also control it while I am setting up with an iPad. The RM does a really fine job for the money.
I also have a MOTU 1248. I cannot say enough good things about it. When I run this one, it stays in the little studio (well, a treated bedroom anyway). It provides monitoring and playback. I have a really sweet sounding living room (non symmetrical, large) and the house was wired cat5. I plug in another motu AVB unit into the wall in that room and AVB links them together. I also picked up a MOTU AVB hub to add more units if needed. Sonar sees all of the inputs and outputs.
Given the cost of additional units, I suspect that the RM unit may be a good value for you.
LL