Any experience of the Elite Hydromag Trainer With Digital Upgrade

I'm looking for a digital/computer cycle trainer which will give me variance evidence eg speed, cadence, hr etc.  Looking around this looks a decent option  http://www.chwhite.btinternet.co.uk/html/elite_wireless_fluid_trainer.html

Other options are a more basic one with a computer with hr and  cadence http://www.evanscycles.com/products/cateye/v3-triple-computer-ec008444

only be speed missing.

Theres better ones out there but they soon start getting expensive.

Suggestions/Recommendations please.

as opposed to an analogue computer ?

I've mentioned digital there as meaning something that will give me feedback, I assume when you say analogue we are talking about something that will do me the same job. (If not assume I'm really thick when you explain, I won't disagree with you!).

I see two options 1. A cheaper trainer and a standard bike computer which could monitor cadence and hr. Or 2. A more expensive trainer which already has those and/or other options included.