Oakwood is okay i guess!, but I wouldn't say it was worth a long journey just to visit it! I went a couple of summers ago, and travelled about 300 odd miles just to visit Oakwood alone! - Is a nice little park with a few good rides worth going on, but personally I wouldn't go again, unless I was nearby.
Megafobia is a great wooden coaster, and its well good if you're riding in the dark or the rain!
They also have a good skycoaster there which Ive been on. Only trouble is, it's pretty expensive! - £33.00 for a solo flight!! RIP OFF! - 2 of you its £16.50 pp, or 3 of you its £11.00 pp. When i went there was a deal on, and i think it was half price which weren't so bad.
Speed doesn't really look amazing to me, but Id definitely like to have a go so i can see what it's like - Hydro was closed when i went, always wondered what the drop on that is like.
Another good attraction they have there is The Crystal Maze - A family version of the TV show. Look here: http://www.cc2000.info/
The "challenges" you are given are relatively easy - No way near as difficult as the TV show, but it's a fun little attraction if you're in a group, and id say it was worth the £4.75 a go (Considering Splash Karts at Towers are £3.00 for a slow ride on some naff karts!!)
I think if Oakwood get their ideas together, it could potentially become a much better park - Only thing that it definitely lacks is a log flume and some rapids.