Is a seimmes(spelling?) 1.5 magnet with a dedicated brain coil mri machine a good choice for seeing ms lesions?

Generally, Yes: Siemens makes a high quality MRI scanner, and 1.5 t is a typical magnet strength. A scanner like that should perform well for evaluating ms. However, the specific maintenance, techniques and software version make a difference as well. American college of radiology accreditation for a scanner requires image and technique review by outside experts and is one sign of a high quality imaging center.

MRI for MS: Yes. 1.5tesla MRI is considered "high field strength" and is the standard at many institutions. There are 3t MRI available but this is not necessary to see ms lesions. The company is siemens and they are one of the major MRI producers.

Yes, valuable tool: At this time the 1.5 Tesla MRI is the most commonly used image to assess and evaluate MS. The 3.0 Tesla may pickup more lesions, but does not provide significantly better clinical diagnostic accuracy.