[wuedi]

only for training purposes take the t4...
it will show your training effect, heart rate, training programme (training coach) etc. on the display of the watch...

if you want an altimeter as well as the epoc thing, play with a training software, have enough money... then take the t6....

just my 2 cents...

	Suunto t4 - Click for more info he Suunto t4 is another excellent addition to Suunto's growing line of fitness training wristop computers. Like all of Suunto's t-Series training watches (the t1, t3, t4, and the original t6) the t4 monitors your heart rate and caloric burn to assist you in developing an optimized fitness regimen. It also provides you with information about the progression and effects of your training through constant feedback on how to maximize the intensity our your exercises without the over exertion of your heart and muscles. This "intelligent sports watch", via a simple cell-phone like interface, offers clear advice on how to get the most out of each and every workout.

	Suunto t6 - Click for more info The Suunto t6 is one of the most exciting new personal training devices to hit the health and fitness market this year. The "t" in t6 (if you don't want to get too technical) stands for "training". It actually refers to the time interval between two heartbeats, or EPOC. Measured to the millisecond, this interval allows you (using the included PC software) to assess your current fitness, set a proper training load, measure your actual fitness gain over time, and achieve your overall fitness goals.

	Suunto Training Effect watches - Click for more info More than a heart rate monitor, Suunto's exclusive Training Effect feature tells you whether you're training too little, too hard or staying within the zones for optimal improvement.