Any $2.50s are fine, i would say $4.50 depend on your skill level but im not sure how swingy these are compared to turbo 180s. $3 45 mans would be cool.
Just get some volume in and see how go from there glgl
The biggest mistake I made in my mtt poker life was to keep playing micros and not move up to the midstakes. I've played only 45 mans on stars and kept a steady 25% ROI at the 1's, 3's, 6.5's & 11's. I've played a **** ton of those 45 mans and have noticed very little difference in opponents.
My advice to you would be this: If you have a good solid ROI then move up in stakes as fast as possible. If you don't have a good ROI then you should spend your time studying and improving your game instead of playing small stakes. Your not gonna get any better grinding out 30 tables of $3 45 mans.
Get yourself a copy of sng wizard and study man. Evaluate all your shove/fold decisions in the late game. Play the quiz feature and set up some realistic opponent models for the calling ranges. The late game is where you make all your money, so make sure to get this part of your game down rock solid.
Your goal should be to crush those games instead of being a small winner. With a 20-25% ROI there are no downswings in the 45s, only break even stretches. I think I've played over 20,000 with no major downswing.
Anyways, gl to u man. Don't be afraid to take shots if you feel confident in your game. I'll be back on at stars soon, hopefully with in a week, I can't wait to start playing those games again.