The 190 range is quite large - the different price points reflect the materials used, Carbon Fibre/Aluminuim etc, weight, maximum support, height.
One key feature on the higher spec models is the ability to mount the centre column horizontally.
I have one of the basic models (CL) which doesn't alloow this horizontal mounting - it wasn't something I needed or wanted and I saved a considerable amount of cash by going without it. I got mine for £90 with an 390RC2 head as part of a deal. There is apost about it
here
The 190 is an excellent quality piece of kit, and suitable for all sorts of photography. Mine has been in rivers, sand, high winds and has always performed very well.
Unless you really need the high spec carbon fibre model, I would save some cash and invest in a tripod bag. Makes life much easier when carrying your tipod around/chucking it in the car, and is very useful to kneel on when on wet beaches, fields etc