I'll give a plug to the QualityWings 757 too (I don't know the current pricing on it now). It is a mid-range 757 (not every system is modeled..) that is fun to fly and looks great. Mid-range FMC and systems modeling. We featured it in the Difficult Approaches article a few issues back taking it in to Tegucigalpa, Honduras:
The JustFlight one looks like a nice deal (can't beat free!)..