The Toughpower XT 575, 675 and Toughpower Grand 650W are the best of the ones in those lists. The TR2-700P recently received a positive review at Hardwaresecrets so you would probably be okay getting that one as well.
If your programs use CUDA then it would make sense to get the highest end Nvidia card (GTX 460 or 560) you can. Otherwise the 6870 is what I would get.
I agree, it sounds like you are doing some big stuff which should get a boost from CUDA. Go buy the nVidia card with the most CUDA cores you can afford, and a PSU to match it.
If your software does not support CUDA then I would highly suggest refreshing your core system instead as it is very outdated for such use.
From all of the graphics cards you've listed the GeForce GTX 560 Ti draws the most power.
For a system running with a single GeForce GTX 560 Ti graphics card NVIDIA specifies a minimum of a 500 Watt or greater power supply having a combined +12 Volt continuous current rating of 30 Amps or greater and having at least two 6-pin PCI-Express supplementary power connectors.
Of the power supply units you've listed, only four are really worthy of consideration as listed by @Silvune and @davcon and will handle any of the graphics cards you've listed:
Thermaltake TR2 Series 700W (TR-700P) (TR2-700AH2NFB) with its +12 Volt continuous current rating of 57 Amps and with two 6-pin & two 6+2-pin PCI-Express supplementary power connectors
Thermaltake Toughpower XT 575W (TPX-575M) with its +12 Volt continuous current rating of 48 Amps and with one 6-pin & one 6+2-pin PCI-Express supplementary power connectors
Thermaltake Toughpower XT 675W (TPX-675M) with its +12 Volt continuous current rating of 56 Amps and with two 6-pin & two 6+2-pin PCI-Express supplementary power connectors
Thermaltake Toughpower Grand 650W (TPG-650M) with its +12 Volt continuous current rating of 52 Amps and with two 6-pin & two 6+2-pin PCI-Express supplementary power connectors
For a system running with two GeForce GTX 560 Ti graphics cards in 2-way SLI mode a power supply with a +12 Volt continuous current rating of 44 Amps or greater and with at least four 6-pin PCI-E Supplementary Power Connectors is recommended.
The Thermaltake Toughpower XT 675W (TPX-675M) meets all of the requirements and even has ample reserve capacity.
What is the room temperature where this system is going to be running?
another important thing how big case and how many fans are needed to keep my gpus under 60 celcias at load.
room temperature can be from 25 degrees at winter and 40 degrees at summer
N.B. i donot have a ac in my room
All of the cards you've listed are going to be dumping at least half or more of their heat load back into the case because of their GPU cooler design.
Keeping your GPUs under 60°C at full load on air cooling using the stock GPU coolers, in the 25°C to 40°C room temperature range that you've specified, isn't ever going to happen. You can't violate the laws of thermodynamics.
Even in a test lab kept at 21°C with the graphics card in an open air environmrent where none of the heat load is recirculated:
Radeon HD 6870
Idle GPU Temperature: 40°C
Load GPU Temperature - Crysis: 72°C
Load GPU Temperature - FurMark: 81°C
GeForce GTX 560 Ti
Idle GPU Temperature: 28°C
Load GPU Temperature - Crysis: 75°C
Load GPU Temperature - FurMark: 79°C