I am planning to build a B&W darkroom. I initially will be doing 6X6 work but plan to move up to 4X5. I'm intersted in the Zone VI 5x7 enlarger sold by Calumet (with the Variable Contrast cold light head). <p> Does anyone have experience with this enlarger? Recommend it? A better alternative? I'm not a professional and price is important but I'm viewing this as an investment. I have roughly a $2500 budget for this.