Most of the elite bows and matthews outback XT's are known for a smooth draw.
Here's a thread on AT just recently on smooth bows for a bad shoulder.
AT thread on bad shoulder bows If you go with an elite bow there's a guy on ebay who sells them for about 50% of what elite does - new. The catch is they are built from parts from when G5 built elite bows and he warranties them himself with parts replacement, elite doesn't warranty them but it is the same exact bow.
I've got a good deal on a used bow but it will rip your shoulder off lol. Just to show you how much faster bows are than 5 years ago. The 2nd cheapest bow that bear archery makes (they make good bows now) that sells for $399 is FASTER than my top of the line/fastest bow Hoyt made 5 years ago that cost a hell of a lot more than $399. My vulcan is 325 IBO speed and the bear 328 and all the other hoyts were slower than that by a fair marging. You don't need 70lb draw weight to get good speed and kinetic energy as much as you used to.
PSE is making good bows for the money now, the stinger ($299), brute ($399) are good bows. Bear is also making good smooth bows for not a lot, legion and mauler etc...
I haven't looke at Hoyt (already own some), Matthews (got burned on a warranty claim), Bowtech (horrible customer service) but everyone makes some smooth bows in the 305-320 ibo speed range nowdays.
Mission bows made by matthews has a bow called the craze I think it is called that has like a 40lb draw weight adjustment, another one to look at.