your friend might be onto something, but i dont knnow if a rensho is the answer.. i dont have one.. im just guessing a new rensho is pretty stiff and some of those rensho angles would make the spanish inquisition proud, then again they could be the most comfy smooth rides around, juvi had a silver bridgestone that you couldnt ride and get off saying all frames are the same
the difference between an iro i had to the spx frame im riding now is like going from 69 bug to a brand new car..ask gravity hurts, hes had 50 track frames and im sure every one has felt different
im all for budget.. but if youre really into bikes.. you should treat yourself sometime,the good thing about track bikes right now is they hold their value (unless you paid stupid money..), so its easy to buy and sell until you find the one thats for you.
i guess i could have just said i think all frames feel different but i just had a big cup of coffee