My choice awhile back was the SLIK8555 which appears to be the simplest of the range made by SLIK. Its only problem for me and I use it with a Panasonic GH2 and 14-140 lens which is not that light a rig is the inability to take a horizontal framed shot when it is held against a post or wall ... for this I made a simple 'L' bracket.
So if you are budget constrained and already have a big tripod I would suggest you go for the ecconomical SLIK
Like most tripods they work better if you do not use the centre column and of course I have a camera with a fully articulated LCD to help with low and high angle shots
Years ago when I knew I was going to take some shots of garden railway stock I made a monopod for my SLR by screwing a quarter whitworth thread into a short length of alumimium tube ... that was back in the days when I lay on the ground