I've dealt with both and honestly i found Ishibashi to be the best, the guitar i got from apollon is great but i found ishibashi easier to deal with and faster to deliver due to using credit cards not paypal plus when i asked apollon about a new guitar price they quoted in US dollars and they were trying to charge an extra $100, Ishibashi do have a higher shipping fee but i took that into account when i crunched the numbers.
I guess it all depends if you want it right now or your willing to wait a week or two longer.
HTH
Steve