I'm not quite sure why you don't want another PC ... and in prices that should fit all budgets (as low as $200+ to $5000+).
[disclaimer]I'm lazy to do much googling for what I feel are inferior alternatives to a cheap PC[/disclaimer]
First, Thank you, you help'd me more than anyone could ;P same gose to Xiong Chiamiov

Second, you dont need to google for me

your post are information function for me

and i can get information, i just sometimes need "key words"
Third, i dont want a PC cuz its to much POWER CONSUME. My avg PC take 200W its 0,2kWh per Hour, and its on for 24/7 so its making my bill for electricity hurt alot. 200$ aint small here its 1/3 of avg salary O_o, and another thing that im studing right now so no work for me.
Finaly: Right now im thinking about buying linksys router, flash it with linux firmware, plug hdd via usb (awww) and it will cost about ~60$ (buying new router). This is the cheapest way - and i will have torrent client, print server, linux terminal, QoS etc - and its 10-12.5W so its x20 less power than normal PC.
The not cheap idea is Atom mobo, with DC adapter, but with RAM and case it will cost ~ 160-200$. it will consume 20-30W (its still x10 less power) and it will have same function as router (but wont be router - no QoS etc) and later it can be a HTPC (?hope im using this right) but only for not bigger movies than 720p (awww)
And the modern PC - I dont need to buy new one cuz like I said, im using one for this (HTPC, downloding) and the power sonsume is 200W+ (its like htpc cuz my only tv is 26" Samsung tv connected via hdmi ;P)
PS. And you are 10000% right about dedicated devices that i will be dissapoited with them - and from what I see they avg price are aroud price of clean atom mobo ~ 100$-150$
I think i know what to do: pass my todays exam from cisco academy ;P, pass my exams in this and next 2 weeks, get some savings - and look for prices then

~ Peace