I just picked up an early 02 manual allroad but it's got a dead egt sensor. I can't find much info posted about this, are there any major downsides to deleting it for a stock turbo car? Or is it worth spending the $80 or so dollars to get the SID motorsports boards from Poland. And as that does it make sense to get the rs4 version to get the larger range?

You are not

Good call. Just get 710n's btw, they're good to 30psi or more just fine.

Don't use fake stuff when it comes to valves, maf's and injectors....well, anything to do with air n fuel or just on your car really, it never ends well for those I've seen "take a chance"! I think I paid about £60 for my gen 710P a few years back.

Speaking of which, the 710N's were replaced with 710P's years ago if you are struggling to find new ones, just use a genuine one of those, also, if you do try 007's and N's/P's you'll need to change your mapping to suit for best results.

 As an example - I bought a car from a "friend" a few years back, felt nice and quick on test drive but slow when I bought it off him. Did some checks and he'd removed the 007 and replaced it for an old N for his own 1.8T (tosser), these are same day log plot's for reference on my 1.8T-
 Custom Code with the 007 it was supoposed to be, he'd replaced with the knackered old N when I went through everything - then I added the P, logged, went to stock map and made a couple of base maps. So I'm sure the CC map lost about 30hp/lb/ft with the change.

AUQ Comparison tq by Rick B, on Flickr

Yeah I don't understand either. I've never tuned a car with an ecu controlled bpv but I've never seen any other car regardless of stock diaphragm bpv, built in efr, or quailty aftermarket piston valve do that unless there was a mechanical problem, like a leak.