arnach,
you'll find that tube circuits are easier to grasp than SS circuits.
Your 15H/150mA choke should be fine, it has a bigger core and has way more headroom towards saturation, hence way less strayfields. Which is good as far as you intend to build PS and amp circuit on the same chassis.
One thing to watch: the qualitiy of the choke, does it show any oscillations durning load change if you measure across it with an oscillosope. A PS choke should not sport any ringing. Because you do not want to shunt the choke with a small cap to cancel the ringing but

act as a coupling cap for exactly the HF junk you do not want to couple thru.
PSUD II: strictly recommended!

Function of the choke: ideally (provided it its inductance is big enough and current is sufficient) it acts as a constant current device, having low DCR but very high ACR. It blocks the HF junk off from the evil world.
Ideally a constant DC current flows thru the choke. If you play around with PSUD, please try out an LC filter after the rectifier.
This will cause a considerable voltage drop, even more if you use a tube rectifier, but the desirable ideal of having DC current thu the choke can be achieved best. And, TME and to experience of all who tried it out, general consensus was it sounds best, too: tube rectifier and LC filter.