If you have a 215 cabinet, it has the port on the side and the speakers angle towards the center, correct?
Not heard anything about the WGS speakers. The specs look good.
There are many fine lower priced speakers out there. I like the JBL M115;s that are a stamped frame, a 2.5"VC and a cloth dome. They put them in their lower end PA cabinets. You can get a pair of them for around $100.00. EV Force 15's are pretty good, but IMHO, don't have the low end JBL's have. I have been impressed with the Kappa series from Eminence as far as construction goes, not had a chance to play them live. They sound good in my basement when I am testing them. They like the 215 cabinet. I reconed a Celestion 15" and was impressed by it. Couldn't sell it so I put it in cabinet and am keeping it. I see them on Ebay for very low prices. Depending on your amp, cast frame Yamaha's are good. Black Widows are fine speakers...but they are a bit pricey I think.
I have a pair of JBL E140's you could have for $140.00 plus shipping. IMHO, it is worth waiting and gathering your money in order to buy the better item than to settle for something right now. You nearly always end up unhappy and paying for what you originally wanted anyhow.