Cant speak for the Performers as Ive never played one, and they just re introduced the line..
BUT, I own a Legend Classic 4 and used to own a Legend Custom 5 (sold it for an NS 2000/5, which was basically it's predecessor).
In my opinion, you arent loosing anything by getting one of these Korean made basses. They sound, feel and play great. They have a huge variety of tones available to you via the components, materials and on board pre's.
They sound punchy, clear and thick and they always cut through the mix. I still use my Classic as my main 4 string. It was my first Spector and has been with me for 5 or 6 years now.
I realize the performers are slightly "lower" on the scale than the Classic's, differing mainly on the pickups and pre amp (being passive/passive against the passive/active in the Legends) and the materials are slightly different, but I doubt you'll be disappointed in any way.
My only warning: be careful, they are addictive! Once you feel the neck and the playability you wont want to stop
Also, if youre willing to go this route, keep in mind that there are used models for sale at really good prices all the time.
You can find older Euro models, which come incredibly close to the USAs in terms of feel and overall sound in many cases (so close that many cant tell the difference) used on all the popular sites. Amazing deals come along quite often for what youre getting.
Honestly, if you ask me, any non Korean Euro that is available for under 1000$ feels like a deal to me, a steal even! Were talking high quality instruments and craftsmanship with years of development with the highest care. Top notch stuff.