I've said it before, pro audio speakers can be hard work to listen to, they're designed to tell you what's wrong with something, rather than whats right. A totally different perspective might be something like a pair of Linn Kans and a Naim Nait 2. A classic combo designed for a small room, and designed for listening to, not dissecting.
Once you've got actives if you decide you don't like the sound you're in the market for an amp and speakers. The other way you can tweak and twiddle your way to something you like.
For £350, plus the sale of the Intek (you'll get about £150) gives you £500 to spend on the amp and speakers. Your sources aren't bad at all, so that's where I'd start.
Kytes are an absolute bargain at the price they fetch, pair them with a really nice amp and you'll be storming. So long as you don't want to listen really loud you'll be fine. Even better is if you can find a pair of Linn Kan stands to sit them on. I replaced an Intek with a Naim 62/140 combo. That sounded stunningly different. Put a pair of Kytes on the end of that and it would blow you away. It's a different approach, not necessarily better, but I think it would lead to longer term satisfaction. I've listened to many a monitor (admittedly not for a fair old while,) and I wouldn't want any of them in my listening room. Yes they may be 'hi-fi' but do you want 'hi-fi' or something to listen to?