Originally Posted by
David DeCristoforo
One thing you don't mention is your budget. There are any number of good machines out there in the 3hp range which, in spite of many opinions to the contrary, will simply blow away any router table setup. In this range, you should look for interchangeable spindles, usually 1/2", 3/4" and a router collet. In addition, many machines in this class also offer a 1" spindle option but this is not a particularly useful size.
Going to a larger machine would get you 5-7HP and a 1.25" spindle and maybe even a tilting spindle but the investment will be much greater and will probably prove to be "overkill" for your use. The smaller machine will mean a couple of passes for "full" RP profiles in hard woods but that's not the end of the world. In fact, it is often much better to run RPs in two passes anyway, the first to "hog off" most of the material and the second to clean up.
As to feeders, it is MMHO that a shaper without a feeder is an incomplete machine. However, the small feeders you can buy for a few hundred bucks are really not substantial enough for a 3hp shaper. Unfortunately, the larger feeders are much more expensive and a small feeder would be better than none at all.
I would not presume to tell you which brand of shaper to buy but I will tell you that if I were buying a new 3HP shaper today it would be a General.