You always got the best deals. Watch out for those clear-top 2399. Now I know why those "5998" vs "421A" debating came from. I agree with Jamie except the " or 2" LOL: "If you can find a 1950s 5998 clear top grab it quick its defiantly a level or 2 above both my single and twin getter 5998s and I would go so far as to say I prefer it to the WE421a. With the clear top the 5998 essentially it looks near identical to the WE421a and I would say its a good mix of combining both the detail and musicality of the two separate tubes."