I've always viewed running VTA on a MAF car not tuned to it akin to drinking alot of natural juice. Its not bad. Its just not good, either. Almost any BOV can be set up to run recirculation, and for the most part its about five seconds worth of work. If you want to try it, you could run VTA for a day or two, and if you don't like it, its as simple as plugging the recirc hose back in.
yeah if you are going to buy a BOV, make sure that it includes an adapter to run in recirc mode if there is a problem. My biggest piece of advice to those who are running VTA, please get your car tuned. If you dont do this it could cause a lot of problems, especially with stalling and stuttering when you're not on the throttle and general loss of performance. That wikipedia article really described the process well, very quality post.