Both the 6.5 & 7MM TCU's will take deer size game, both are usually very accurate. I have a 6.5TCU and really like it. I never hunt it because like you I have a way better choice for deer in my 30-30IMP, 357Max, 6.5JDJ. With what barrels you list you have in my opinion there are two slots you need to fill. Looks like you need a .224cal., such as a .223, .222, 22Hornet. You list a 22Mag but I still see room for a 22L.R., cheap to play with. Also may want to consider a 17MACH2, also cheap to shoot and extremely accurate.