Aperture 1.5 vs Lightroom beta 4

Now that I have my hardware all setup, I am now digging down deep into both Aperture and Lightroom. There are many things to love about each application, but here are some quick bullet points on where my head is at the moment:
Aperture pluses:
- Dust spot removal tool built-in
- Integration with photoshelter.com for stock and print sales (HUGE benefit)
- Very nice video tutorials that ship with the product
- 'Stacks' and 'versions'
- Backups to vaults
Aperture minuses:
- RAW conversion quality close, but not as good as ACR, C1 or Lightroom
- 24" display a minumum, but a 30" display is ideal. Not easy to work on a small-ish Macbook screen while on-the-go
- Sluggish importing a large amount of images, even with a MacPro 2.66ghz machine with 5GB of memory and an X1900 graphics card.
- No ability to hold down option/alt key when working with black points, so I have absolutely no idea what I am clipping out of my image.
- Backing up to vaults requires managing images inside a library, instead of referencing them elsewhere.
Lightroom beta 4 pluses:
- Acceptable performance, which should be better with released version in 2007
- I love the interface
- RAW conversion tools, as well as output quality, is top notch
- Workflow takes a 1-2-3 approach
Lightroom beta 4 minuses:
- Not a released product
- Modal approach, which means certain tools are not available unless you are in the intended module.
- Workflow takes a 1-2-3 approach
- No integration at this time with photoshelter.com
- No spot/dust removal tool in this release (perhaps in final product?)
- Unclear backup methodology
The pragmatic side of me tells me to adopt Aperture 1.5 as my application of choice, but the emotional side of me tells me to hold out a little longer for Lightroom. I certainly like the interface much better in Lightroom, as well as the RAW conversions. This is a young market at the moment, and these products will only get better with time. I can be convinced to use either product at this time, and it benefits me and my workshop and safari customers to know both of them, so I am going to run parallel for the next few months.
Stay tuned.