Euro-light H4 bulb upgrade suggestions?

[ck42]

I've converted to the E1 lights and have what I believe is just the standard wattage H4 bulb.

The question is:

What sort of benefit could I expect from upgrading to some other type of H4 replacement?

I realize that I'd prolly have to upgrade the wiring/relay, etc. but am unsure as to cost/benefit of an upgrade.

Is there maybe a better performing H4 bulb of the same wattage that's simply from a diff. manufacturer?