Well, first of all - welcome to Talk Bass.
Strings? String choice is a pretty personal thing, and only you will know what you like. The bass you play; what you play; and how you play, are all factors that will help determine which strings work and sound best - for you. Without knowing that, all I could say about what string gauge to use is - if you like the strings you have now, stick with that gauge. If not? Then, in general; go lighter if you want less tension; heavier if you want more. As for Warwick strings? I've only ever used their strings once. I put a set of Black Label Low B's on this Kramer 450B. For reasons that had nothing to do with the quality - or the tone - of the Warwicks, they didn't stay on it long. The Low Bs are for BEAD tuning, and.. well, the Kramer just isn't the bass for that. But, they were good strings - if you like stainless roundwounds. Which I don't, particularly. I didn't throw them away, though; thought I'd save them until I got a bass better suited for BEAD tuning. Sadly, when I did get one - I couldn't find the Warwicks anywhere. So, it wears strings that aren't stainless rounds. Still, I would have re-used them if I could have. But, yeah, I'd say that they're good strings, and certainly worth a try. But, there are a
lot of stainless roundwound strings out there. Personally, unless I could just walk into the nearest music store and buy Warwick strings, I'd probably use a brand of SS rounds that I could replace easily. Because, unless you really like the sound of dead rounds, you will be replacing them - fairly often. That's one of the reasons why most of my basses have flat wounds on them. And, with few exceptions, I use 45-105 gauge strings.