I love these and these are a good price. To confirm, the surrounds to the cabinet should be silver and the original grille was a thick foam thing that disintegrates rapidly - I've never seen a pair with this surviving. If you're not sure about the white grille and gold surround, then they can easily be changed.
As to the tweeter, it is a bit like living with a dangerous dog - most of the time it's fairly docile but you're never quite sure when it's going to turn round and rip your head off. That said, it does respond well to capacitor upgrades in the tweeter circuit -better than any other speaker I've encountered in fact. Also, you MUST, repeat, MUST replace the wires connecting the crossover to the bass driver if it's still original. Leak used what appears to be dental floss and I have inadvertently proved it actually removes part of the bass spectrum!
They're great, fun loudspeakers - imagery is good if not pinpoint, the bass is surprisingly couth but deep when it needs to be and the midrange is superb. The only downsides are that edgy treble and a slight upper bass chestiness that I put down to the big bass cabinet resonating gently at certain frequencies.
As to the 3090s with the Isodynamic tweeter, the slight upper bass issue still applies but there is nothing else wrong with these at all. They are truly stunning across the entire frequency range and image superbly. I personally rate them as some of the best speakers i have ever heard and, if it hadn't have been for our Beolab 90s, I'd have kept mine and would be using them in the lounge today.