Need advice from Gadget gurus

I am planning to buy a new notebook for my home office use. Though I don't run a business from home it simply means that i will have the following application server, web server and a database server installed for my learning. Mostly the list will include

1. IBM Lotus Domino server V8.5.x
2. IBM Lotus Quickr server V8.5.x
3. IBM Lotus Symphony
4. IBM WebSphere Portal V6.1.x with WCM
5. DB2 / My SQL / MS-SQL
6. IIS, IBM Http server / Tomcat / JBoss
7. Lotus Notes, Lotus Domino Designer and Administrator V8.5.x
8. Eclipse / RAD tools
9. MS Visual Studio
10. MS - Office full suite including Visio, Project etc
11. FeedDemon reader
12. Windows live writer
13. Nokia PC suite
14. IE, Firefox and Chrome
15. IM tools, Skype
16. Photo editing tools
17. Plus the Windows 7 system programs and Laptop manufacturer specific programs
18. And sometimes go crazy download and install web frameworks and once in a while gaming, watching movies etc

I am pondering over Lenovo Thinkpad 410 vs Thinkpad 410i vs Samsung R480

• Lenovo Thinkpad 410 Configuration priced around SGD 2250

Processors	Intel® CoreTM i5-520M processor   (2.40GHz up to 2.93GHz with Turbo Boost, 3MB L3 Cache)
Operating system12	Genuine Windows®7 Professional
Chipset	Mobile Intel® QM57 Chipset
Memory8	2GB DDR3 SDRAM
Hard disk4	320GB SATA HDD (7200 rpm)
Optical device5	Dual Layer Multiburner Drive (DVD-RW)
Graphics	Intel® Graphics Media Accelerator HD Graphics
Display	14.1" WXGA+ TFT with X201 LED Backlight Display
Battery	6-cell Li-ion Battery
Warranty	3-year on-site Warranty

•  Lenovo Thinkpad 410i Configuration priced around SGD 2050

Processors	Intel® CoreTM i5-430M processor   (2.26GHz up to 2.53GHz with Turbo Boost, 3MB L3 Cache)
Operating system12	Genuine Windows®7 Professional
Chipset	Mobile Intel® QM57 Chipset
Memory8	2GB DDR3 SDRAM
Hard disk4	320GB SATA HDD (7200 rpm)
Optical device5	Dual Layer Multiburner Drive (DVD-RW)
Graphics	Intel® Graphics Media Accelerator HD Graphics
Display	14.1" WXGA+ TFT with X201 LED Backlight Display
Battery	6-cell Li-ion Battery
Warranty	3-year on-site Warranty

•  Samsung R480 Configuration priced around SGD 1500

Processors	Intel Сore i5 540M, 2.53 GHz
Operating system12	Genuine Windows 7 Home Premium (32 bit).
Chipset	Intel HM55 Express
Memory8	4GB (DDR3/2GB x 2)
Hard disk4	500GB (5,400rpm S-ATA)
Optical device5	Super Multi Dual Layer (S-ATA)
Graphics	nVIDIA GeForce 310M 512MB gDDR3
Display	35.56cm (14.0 inch) LED HD (1366 x 768) 16:9 Gloss
Battery	6-cell Li-ion Battery
Warranty	2 year local warranty

For the requirements stated above, which once would be a better choice? While i am tempted to buy Samsung purely because of pricing, i am not sure whether it can meet my requirements given above.  Thanks in advance. Happy weekend ;)