From my exerience, TurboXS makes excellent products. For awhile, I was known as a TurboXS whore
I have had most of there WRX products on my car; including utec, front mount, RFL, exhaust, to name a few. I have also heard wonderful things about there new DTEC boost controller. You will be fine with an RFL like stated above, take it from people with first hand experience.
Salamicity: You can keep your RFL with a front mount. If you get the TXS front mount, it will be flanged for it. The Perrin comes with an adapater for the stock BPV, so you can just use your RFL on its TMIC flange. I believe the APS front mounts come with these adapters now as well.