Between the Euro or a CRFM, I agree with Smadder that the CRFM is the way to go. My CRFM is a cut above my Euro LX in both construction and tone, and IMHO, a CRFM equipped with the USA 9-volt circuit will give you 95% of the tone of a USA NS series. For those on a budget or just looking for an incredible value, this is the way to go.
That said, I recommend saving for a USA NS-2 or NS-4. I have been very happy with my Euro LX for the past six years, but in the back of my mind I'd always wondered whether or not I was missing anything by not owning a USA Spector.
The answer was yes.
When I finally got my USA NS-4, I had an ephiphany - this was the exact, no-compromise sound I had been chasing for the past 30 years.
(As a side note, I would recommend to anyone in the market for a USA Spector that they consider both the NS-2 and the NS-4. The NS-2 may be Spector's flagship, but the NS-4 is every bit as versatile, powerful and awesome.)
I no longer wonder if my tone could be any better - it is exactly as I want it now.
Put an end to the wondering & wanting, and buy the last bass you'll ever need - Buy a USA Spector!