I agree with Shubert above... rega shines on acoustic/vocals, while for rock/nu disco I'd go with PSBs... too bad you can't get both.
I have the Rega Rs5 and a pair of image t5.
Image t5 are not in the same league as the rega; after all this is the poor man's version of the imagine. But the t5 give more HT-type bass and it can be fun at times. The Regas image very well, are more forward, and have a super clean midrange. The bass is there, less impactful than the PSB but much cleaner.
The tough decision is on you as they are both very good speakers.
I have the Rega Rs5 and a pair of image t5.
Image t5 are not in the same league as the rega; after all this is the poor man's version of the imagine. But the t5 give more HT-type bass and it can be fun at times. The Regas image very well, are more forward, and have a super clean midrange. The bass is there, less impactful than the PSB but much cleaner.
The tough decision is on you as they are both very good speakers.