BCPR7E VG alternative to BCPR7ES

[alundra]

I need your advice.
I'm modded with stock T2 at 0.8 bars, intercooled, exhaust, air filter...
I'm looking for 8 spark plugs because of my cylinder head.
I saw this on ebay:
http://cgi.ebay.fr/ws/eBayISAPI.dll?...=STRK:MEWNX:IT

Same as BCPR7ES but the electrode is in V shape for better emssions and fuel "economy".
They're are made by NGK.

Are they a cheap alternative?

Cheers.

P.S: I ran on BCPR7ES 3 years now and i need to change them.