offset questions?

[88lxi-shortram]

i dont know much about offset or any of that stuff so i was wondering about what offset we could run on the 3geez? i want to buy some konig rewinds to give it that old school look but i want them to have a deep look to them to kind of like these:
http://images.search.yahoo.com/images/view?back=http%3A%2F%2Fimages.search.yahoo.com%2Fs earch%2Fimages%3Fp%3Drims%2Bthat%2Bare%2Bdeep%2Bse t%26ei%3DUTF-8%26fr2%3Dtab-web&w=800&h=531&imgurl=img.photobucket.com%2Falbums%2Fv673%2FEject TheReject00%2FIMG_9072.jpg&rurl=http%3A%2F%2Fforums.nicoclub.com%2Fdeep-dish-rims-95-240sx-s14-t361508.html&size=60KB&name=Deep+Dish+Rims.+...&p=rims+that+are+deep+set&oid=057fdd582a708bc6ffcad599346758fc&fr2=tab-web&no=4&tt=7810&sigr=1235qessi&sigi=11t4ko31f&sigb=12q211e6o
even if offset doesnt effect this i will still want the rewind as they are cheap and still look decent but they come in sizes:
15" 7"wide 20 offset
15" 7"wide 40 offset
so which ever one would give me the deepest look ill buy after the swap but i want to get my shopping list together :)
so somebody explain which ones is which

[turabaka]

The +20 offset rims will stick out about an inch past the fenders. The +40's will sit about flush with the fenders, but it won't have a huge lip on it. You could always run the +20's and build some custom wide body fenders like what the AE86 guys do.

[88lxi-shortram]

ok ill probably go with the 20" then