I frankly won't pay more than $200 for TF10 (ex-shipping, customs etc.,).
I have not even tried TF10, so people are free to correct. TF10 has a V shaped frequency response, has plenty of bass, but has clarity and detailing. Bass won't intrude into mids; but recessed mids can be an issue. It also has bad fit for many. But, one good thing is it has detachable cable.
Comply foams seem to give it a good fit, but I won't ever recommend that. Complys usually soften the treble and you lose the details. May be for an IEM with in-your-face treble, it would be a great fit. However, I have a terrible disliking for their short life (2-4 weeks depending on your usage), high price and I don't think it's available locally.
The other mods - re-shelling TF10 (Mage etc.,) and a different cable could make a (huge) difference, but then you are looking at spending more $$$ in all cases.
So factor in everything in case you decide in favour of TF10.
Personally, I've always been tempted by TF10. But, I was never sure if it could be my only or primary IEM.
I'd stress the same thing again - the key to finding your IEM is to first find your preferred taste. Try a decent IEM like NE-6 or M2. See what more you want and then search in that direction. Things would become easier when you find a reviewer who feels the same way about the IEM like you do. Once you fix on an IEM, try to find all the negative things about it and see if you will have any issues with the so called "problems". Takes a bit of work - but it's always worth it.
EP-630 (not heard PL-11) is my first IEM. It still gives me a cool, good fit. But, it's like listening to half a song. How do you find the bass of EP-630? Enough quantity? May be we can even take it from there.