To Hexon or not to Hexon - Kallistra

I've been eyeing up Kallistra's Hexon system for some time and am going through the internal processes of justifying the purchase. After a great deal of thought and looking at the pro's and con's it will probably end up as an impulse buy anyway, much like most of my lead mountain, mainly because it looks cool.
Having said that I'm not particularly happy with the way things like roads and rivers are laid on top of the hex grid. I fully appreciate that this is the most pragmatic approach to this wargaming dilemma however a search of the oracle provided one solution. This involves purchasing blank hexes and inverting them. You then have a depth of 10mm to play with allowing you to sink rivers, roads and trench system below table level. Anyway I thought I would give this a go.

I purchased Kallistra's standard blank pack containing 10 single hexes for £7. First step was to mark out on which face the river/stream would enter each hex . I then cut out the side walls of those hex sides using a Dremil.

Next step was to carve out from 10mm styrene foam the course of the river. Sheets of this foam which is dense and can be carved and shaped and purchased from Antenocitis Workshop. The foam was then glued down using a special styrene cement (UHU Por Styrofoam) which wont dissovle it but which adheres different plastics unlike PVA.

This was then covered with a standard DIY premixed filler mixed with a little PVA.

All pieces were then painted with Dulux Salisbury Stone acrylic as recommended by Kallistra which matches the colour of the plastic. This paint range is ideal for terrain making as a 250ml sample pot can be purchased for around £3. The large DIY stores can usually mix a colour on demand from a range of 16,000.

The water was cover with Saphire Blue from the same range. Yes, river water is usually brown/green but it doesn't look as good.

River banks were added using the colour Rich Havanna then a topping of sand grit which was dry brushed with Earth glaze and Desert sands. The water had a layer of Vallejo water effect which adds a texture and a gloss shine.

Finally, the ground was covered with Kallistra flock so it will match in with their preflocked range of hexes.

And the finished result which I'm quite happy with. However 10 hexes will not a river system make. This took about 5 hours over a week to make and I probably would need about another 30 pieces for a small table but similar techniques can be used for trench systems and sunken roads so the approach is feasible. So do I purchase the Hexon system?