In typical STW fashion, recommend what you have! Just rebuilt my 2006 one. If you can find it in a larger size it is not too bad for getting to and from trails.
http://www.bikeradar.com/gear/category/bikes/mountain-bikes/product/review-kona-shred-08-28424/
https://goo.gl/photos/uV7cTakto6sAUK4u8
This is my actual bike which I did 42km on on Sunday. I have lighter forks, wheels, bars and stem, but it was built up on limited time and what was knocking about, so I think I will keep it but get a lighter post and saddle, a back tyre with grip, some longer cranks and go 1×9. There is a size larger than that, but I am 5’9″ and had the saddle at that height (well I set it there and it gradually slipped till I was hitting my knees on my chin!!).
You can pick them up for pittance as there are hundreds knocking about, and they are very solid.