I currently have the RHA T20's but I'm thinking about sending them back for the G10's. Personally, I can't seem to get the fit of the T20's comfortable. I'm using Comply tips now and they are comfortable, but at the office where I use them, I'm always pulling them in and out and having to compress the tips every time prior to inserting. It gets old after 4 or 5 times of doing so. That is why I like silicon tips, but none of the included RHA tips isolate very well for me and the retention is terrible.
I like the overall sound quality of the T20's but could use more low end, personally. That is why I started looking at the G10's. If that is going to sacrifice the overall sound quality then I'm not sure that is the step I want to take. Do you have any suggestions for my predicament? Thanks!
My first suggestion is that you should try other aftermarket silicone eartips with your T20 first. If you have problem with common eartips design, then there might be a good chance you will run into the same problem with other IEM as well. Like all Future Sonics's universal, the G10 comes with a tri-flanges and it really does require some getting used to as it is not really the most comfortable eartips you will find.
Also, won't hurt to bend the T20's cable a bit more (the part that is closest to the earpiece that looks to have some memory wire inside) so it will better fit the curve of your outer ears. Don't forget to use the chin slider / cable guide as well. Last item to check is the eartips size - might worth a try to use the eartips that is one size larger / smaller to see if they will fit your ear well. Also worth noting is, Comply does have the TS series, which doesn't require any compression before inserting.
As I said before, G10 (and Future Sonics' universal in general) doesn't really have that great a fit but rather require some getting used to. So if fit is the reason why you want to chance IEM, I am not sure G10 will be the top of the choice. Of course, fit is also a very personal thing so it might work for you. Just that we won't know for sure till you tried it.