Since you already have a good PSU, if I were you, I'd wait until you know you need it.
Unless you're buying something very high-end (and
very expensive) I can't imagine that kind of power will be needed.
The 9000 series have been very modest on power, so I'd expect the 9800X3D to continue this trend.
If you do want to buy now, then some suggestions:
My basket at OcUK:
Total: £377.93 (includes delivery: £7.99)
Review of the TUF Gold here:
www.anandtech.com
Review of the Antec HCG Pro here:
It has been some time since we last looked at a power supply from Antec, however today we analyse a
www.kitguru.net
The Antec has the added bonus of an active Antec rep here on the forums.