Why not see how you get on with

LTspice? Its certainly not intuitive, but it wont cost you anything

^{*} except the time it takes to learn it, and is a full SPICE program with no arbitrary node or model limits, with a *LOT* of third party resources available including comprehensive user contributed model libraries.

Its got a fairly comprehensive universal OPAMP model- just plug in the parameters and level of modelling required. After installation, from your LTspice working folder, navigate to examples\Educational\UniversalOpamp2.asc to find out how to configure your OPAMP.

Many third party un-encrypted PSpice models are LTspice compatible, and many others only fail due to minor syntax differences that can easily be overcome by hand-editing the model's netlist.

** its zero cost, including professional use, unless you are in the semiconductor manufacturing business.*