All fine options. Konigs have stepped up their quality in recent years, they are a lot nicer than they used to be. RPF1's are a 'starting point' example I usually use because they do so much well, and some people love them.
The Raijin and Gojin are two personal favorites from the tuning line, they are going to be a little heavier, but still plenty strong and less expensive. When you go to an 18" wheel, you're sacrificing some tire sidewall that may make it ride a bit more rough, but that's okay if you're expecting it.
I'm not into 18" wheels personally, but the offsets should still be accurate if you go with an 8" wide wheel which is generally my recommendation for these cars. Contrary to popular believe, it's very possible to put too much wheel/tire on these cars.
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SOLD: 2015 WRB BRZ Limited ('02 WRX BBS, S-04's, Stoptech Sport pads, MXP SP, AVO drop in filter, Mishimoto Intake tube, decatted header, OFT 93 Stage 2 EL Tune, Kartboy rear shifter bushing, Whiteline transmission and subframe lockout bushings, ST Coilovers, SPC Camber bolts w/smaller crash bolt, SPC LCA's & SPC Toe Arm bushings, Red TOMs, TRD Wing.)