Best choice for preamp 1-10uf cap values?

I have a CJ PV10A where I have replaced all the caps in it. For the small value film caps those are Vcap's and Clarity Cap MR's and for the power supply Clarity Cap TC's. However in between I'm using 2uf Rel thetas, and Mundorf supreme 3.8uf and 6.8uf values. These are physically about as big as I can fit. Wondering if anyone has opinions on a better capacitor at like physical size?