The market goes in cycles, and I can tell you from my Climbto350 membership, the 135 guys are looking like crazy. Worst thing is most ops are single-pilot IFR, so you need the 1200TT, which obviously the airlines don't for the SIC's.
Another thing is my company does pay well. $27k/yr rate after you complete your check-ride, and a nice raise @ the 6mo. check-ride also. It's a different environment for sure, but I'll take it any day to flying for the airlines.