My take is that with HT use, it's not as important for the speakers to be matched as much as it is with music. I think JBL does make some ceiling speakers (maybe in wall's too) that use the same tweeter as the Studio 5 series, but they are in their Pro line and quite expensive. I'm using Polk surrounds with a dome tweeter for my surrounds with JBL Studio 530's for my three fronts and don't notice any change in sound as things pan in surround use. For serious multi channel music listening, I think it would be a bigger deal.
7.4.4 Theater Room: JVC-RS500, Silver Ticket AT 2.35:1 142”, Onkyo RZ830, Anthem PVA-7, Panasonic DBT-110, JBL Studio 530’s, 4 - 15" DIY Sealed Subs
3.1 Living Room: Samsung 64” F8500 Plasma, Anthem MRX 300, Dynaudio Audience 52’s, Dynaudio Audience 122C, NHT SubOne