Macbook Pro or Summin else?

[dogsballs]

My old notebook is long in the tooth, but thats another topic. Looking to get a new laptop. Price isn't really an issue; I just want something that will be very lag-free and sumultaneously run 4 or 5 poker sites/8 poker tables/PT/PAHUD/iTunes/Interent browsing handily. The lag I currently get when I run a few programs, esp if Full Tilt is included, is driving me insane. I'm prepared to pay for quality. I'm not into gaming at all; just poker, music and internet. Can spend $3 or $4k & I'm tempted by the 17" Macbook Pro. Most relevant specs are below at bottom of this post.

I already have two Dell 2001FP's.

Questions:

1) Is running Windows in a Macbook more "immune" to getting bogged down by trojans/bad stuff from outside? Or same as a PC laptop would be?

2) Can I run two dell 2001FP's as well as the native display from the macbook? ie 3 screens total.

3) Looking at Apple stuff. What is Tiger & Leopard? Should I wait for Leopard to come out?

4) 4GB RAM? I like playing safe.

5) Should I not bother w the Mac & just max out a PC notebook.

Thanks for any suggestions.





Processor and memory
* 17-inch MacBook Pro
2.4GHz Intel Core 2 Duo processor, 4MB on-chip shared L2 cache running 1:1 with processor speed
* 2GB (two SO-DIMMs) of PC2-5300 (667MHz) DDR2 memory; two SO-DIMM slots support up to 4GB
* 800MHz frontside bus

Video and graphics support
* 17-inch MacBook Pro
NVIDIA GeForce 8600M GT graphics processor with dual-link DVI support and 256MB of GDDR3 SDRAM.
iSight
* Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display, both at millions of colors
* DVI output port
* VGA output using included DVI to VGA adapter


Storage

* 17-inch MacBook Pro
o 160GB 5400-rpm Serial ATA hard drive; optional 160GB 7200-rpm or 250GB 4200-rpm drive3
o 8x slot-loading SuperDrive (DVD±R DL/DVD±RW/CD-RW)
+ Maximum write: 8x DVD-R, DVD+R, DVD+RW; 6x DVD-RW; 4x DVD-R DL (double layer), DVD+R DL (double layer); 24x CD-R; 16x CD-RW
+ Maximum read: 8x DVD-R, DVD+R, DVD+RW, DVD-ROM; 6x DVD-ROM (double layer DVD-9), DVD-R DL (double layer), DVD+R DL (double layer), DVD-RW; 24x CD


Display

* 17-inch MacBook Pro
o 17-inch (diagonal) TFT display with support for millions of colors; optional glossy widescreen display
Supported resolutions: 1680 by 1050 (native), 1280 by 800, 1152 by 720, 1024 by 640, and 800 by 500 at 16:10 aspect ratio; 1280 by 1024 at 5:4 aspect ratio; 1280 by 1024 at 5:4 aspect ratio stretched; 1024 by 768, 800 by 600, and 640 by 480 at 4:3 aspect ratio; 1024 by 768, 800 by 600, and 640 by 480 at 4:3 aspect ratio stretched; 720 by 480 at 3:2 aspect ratio; 720 by 480 at 3:2 aspect ratio stretched
Optional 17-inch (diagonal) TFT widescreen display with support for millions of colors; optional glossy widescreen display. Supported resolutions: 1920 by 1200 (native), 1680 by 1050, 1280 by 800, 1152 by 720, 1024 by 640, and 800 by 500 at 16:10 aspect ratio; 1280 by 1024 at 5:4 aspect ratio; 1280 by 1024 at 5:4 aspect ratio stretched; 1600 by 1200, 1024 by 768, 800 by 600, and 640 by 480 at 4:3 aspect ratio; 1600 by 1200, 1024 by 768, 800 by 600, and 640 by 480 at 4:3 aspect ratio stretched; 720 by 480 at 3:2 aspect ratio; 720 by 480 at 3:2 aspect ratio stretched