I have to reload my Deluxe and order a new G2 disc, mine is scratched. But, the zoom you describe doesn't sound like the one I use. Granted speed may be hard to tell when landing, but that's also hard for me tell on my real plane when it is heaeded towards me. I use the throttle location as an indicator.
I will have to admit, I have not used the Dave Brown so I can't really coment on it. But that last flight sim I used other than G2, was on a Commadore 64, that tells ya a lot
I was running G2 real well on a 750mhz machine, can pick them up real cheap now.
See ya,
Randy