For 2/3 the price of an SVT-CL its the most pricy 'non-SVT' SVT. It's not class D like the 7 Pro so it's 'heavy' by today's standards. It's $100 less than a new V4-B. It has the most tubes (unless I am mistaken) of any of the 'non-SVT' SVT's, but would you say it sounds the most like an SVT among them? It definitely doesn't sound bad (to me) but ultimately it wasn't what I was looking for. I'm not bitter about it, but I can only speak for myself.
Also, everyone has had one or played one, its a very popular head. At what you might call the height of its popularity, Class D was introduced. And arguably the non Pro version of the 3 was a better sounding. Some of each of the 3 and 3 Pro had power issues and that probably also put a bad taste in people's mouth.
The SVT-4PRO is the big one and the most expensive, that's the one i would grab if I were going SS. It's got three preamp tubes which it makes it the highest tube count of the SS SVT heads.
https://ampeg.com/products/pro/svt4pro/